Optical recording/reproducing apparatus for CLV error recovery and method thereof

Abstract

Disclosed are an optical recording/reproducing apparatus for a CLV error recovery and a method thereof that can recover from a CLV error in a short time. The apparatus includes a spindle motor control unit for controlling a rotating speed of a spindle motor and comparing the present rotating speed of the spindle with a specified speed, a pickup unit, a signal conversion unit for receiving and converting an output signal of the pickup unit into a digital signal, and generating a judgment signal for determining whether a spindle control is normally performed, a sync signal generation unit for receiving the judgment signal and determining whether the spindle control is normally performed, a storage unit for storing position values of the disk and rotating speed values of the spindle at the positions of the disk in a table, and a control unit for controlling the spindle motor control unit to change the rotating speed of the spindle according to a comparison result obtained by the spindle motor control unit and a judgment result obtained by the sync signal generation unit.

1 . An optical recording/reproducing apparatus for a CLV (Constant Linear Velocity) error recovery, comprising: 
 a spindle motor control unit to control a rotating speed of a spindle motor that rotates a disk and to compare the present rotating speed of the spindle with a specified speed;    a pickup unit to irradiate beams onto the disk, to receive the beams reflected from the disk and to output a corresponding RF signal;    a signal conversion unit to receive and convert the signal output from the pickup unit into a digital signal, and to generate a judgment signal for determining whether a spindle control is normally performed;    a sync signal generation unit to receive the judgment signal and determine whether the spindle control is normally performed;    a storage unit to store position values of the disk and rotating speed values of the spindle at the positions of the disk in a table; and    a control unit to control the spindle motor control unit to change the rotating speed of the spindle according to a comparison result obtained by the spindle motor control unit and a judgment result obtained by the sync signal generation unit.    
   
   
       2 . The optical recording/reproducing apparatus as claimed in  claim 1 , wherein the control unit operates to store the present rotating speed of the spindle and a present data position in the storage unit if the present rotating speed of the spindle is equal to the rotating speed of the spindle stored in the storage unit and the spindle control is normally performed.  
   
   
       3 . The optical recording/reproducing apparatus as claimed in  claim 1 , wherein the control unit controls the spindle motor control unit to change the rotating speed of the spindle if the present rotating speed of the spindle is different from the rotating speed of the spindle stored in the storage unit.  
   
   
       4 . The optical recording/reproducing apparatus as claimed in  claim 1 , wherein the specified speed is any one of the rotating speed values of the spindle stored in the storage unit according to the specified position of the disk.  
   
   
       5 . A method for a CLV (Constant Linear Velocity) error recovery in an optical recording/reproducing apparatus, comprising: 
 determining whether a spindle control is normally performed if a CLV error occurs in the optical recording/reproducing apparatus;    comparing a present rotating speed of the spindle with a specified speed if the spindle control is not normally performed;    determining whether the spindle control is normally performed if the present rotating speed of the spindle is equal to the specified speed; and    reading a data position of the disk if the spindle control is normally performed.    
   
   
       6 . The method as claimed in  claim 5 , wherein the specified speed is the rotating speed of the spindle at a specified position of the disk, and the rotating speed of the spindle according to the specified position of the disk is stored in a table.  
   
   
       7 . The method as claimed in  claim 5 , wherein if the present rotating speed of the spindle is equal to the specified speed but the spindle control is not normally performed, the rotating speed of the spindle is changed.  
   
   
       8 . The method as claimed in  claim 5 , further comprising storing the read data position and the rotating speed of the spindle at the data position.  
   
   
       9 . A method for a CLV (Constant Linear Velocity) error recovery in an optical recording/reproducing apparatus, comprising: 
 determining whether a spindle control is normally performed by evaluating whether a present rotating speed of the spindle is equal to a specified speed.    
   
   
       10 . The method of CLV (Constant Linear Velocity) error recovery in an optical recording/reproducing apparatus according to  claim 9 , further comprising setting the rotating speed of the spindle using a prepared speed table.  
   
   
       11 . The method of CLV (Constant Linear Velocity) error recovery in an optical recording/reproducing apparatus according to  claim 10 , further comprising storing data positions and speed values equal to corresponding data positions of the spindle in the speed table.  
   
   
       12 . The method of CLV (Constant Linear Velocity) error recovery in an optical recording/reproducing apparatus according to  claim 10 , wherein said rotating speed of the spindle reaches a specified speed stored in the speed table depending on a state of a spindle judgment signal.  
   
   
       13 . The method of CLV (Constant Linear Velocity) error recovery in an optical recording/reproducing apparatus according to  claim 12 , further comprising: 
 comparing the rotating speed of the spindle sensed by a sensor with a rotating speed of a spindle in the speed table to determine the state of the spindle judgment signal.